'Set A Watch' in the Bible

Nevertheless we made our prayer unto our God, and set a watch against them day and night, because of them.

“Am I the sea, or the sea monster,That You set a guard over me?

Set a watch, O LORD, before my mouth; keep the door of my lips.

For thus hath the Lord said unto me, Go, set a watchman, let him declare what he seeth.

but this you conceive, that if a man knew at what hour of the night the thief would come, he would set a watch, and not suffer his house to be broke open.